Hi have this very nice looking stainless steel Bosch oven that has been working great until a couple of days ago when suddenly the unit stop heating. The lights, the fan, and the fan for the convection and the clock work all work fine. It is just that when set to the bake, broil, or convection, the elements do not heat up.

I am thinking it must be a limit switch or something common to both the bake and the broil. There is no error message from the control pannel and the clock seems to be working fine. So I am thinking it must not be the control pannel.

Please help. I would like to buy the replacement part to fix this but don't know which to buy.